wildfire

American  

[wahyld-fahy^uhr] / ˈwaɪldˌfaɪər /

noun

1. any large fire in brush, forests, or open spaces that spreads rapidly and is hard to extinguish.

2. a highly flammable composition, such as Greek fire, difficult to extinguish when ignited, formerly used in warfare.

3. sheet lightning, unaccompanied by thunder.

4. the ignis fatuus or a similar light.

5. Plant Pathology. a disease of tobacco and soybeans, characterized by brown, necrotic spots, each surrounded by a yellow band, on the leaves and caused by the bacterium Pseudomonas tabaci.

6. Pathology Obsolete. erysipelas or some similar disease.

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wildfire British  

/ ˈwaɪldˌfaɪə /

noun

1. a highly flammable material, such as Greek fire, formerly used in warfare

2. 1. a raging and uncontrollable fire

   2. anything that is disseminated quickly (esp in the phrase spread like wildfire )

3. lightning without audible thunder

4. another name for will-o'-the-wisp

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wildfire Idioms  

1. see spread like wildfire.

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Etymology

Origin of wildfire

First recorded before 1000; Middle English wildefire, Old English wildfȳr; equivalent to wild + fire

Explanation

A wildfire is an uncontrolled blaze, especially one that ignites rural areas with a lot of trees and dry brush. Factors like drought, unusually warm weather, and development can contribute to bigger wildfires. Wildfires are a natural part of many forest lifecycles, but human activity and climate change have made these conflagrations more frequent and dangerous. Unextinguished campfires, lightning strikes, and power lines can all ignite a fire that spreads and becomes a wildfire, given dry enough conditions. The biggest U.S. wildfire, which burned acres of the Santa Fe National Forest in New Mexico, devastated an area larger than New York City. In Old English, a wildfire was a wilde fyr.

Example Sentences

At the same time, the governor’s latest budget proposal puts the state on track to allocate the majority of the climate bond’s $1.5 billion in wildfire prevention money within just three years.

From Los Angeles Times • May 30, 2026

Forest Service spent $3.1 billion mitigating wildfire conditions in the state over the last few years, California spent $4.3 billion, according to the California Forest Resilience and Wildfire Task Force.

From Los Angeles Times • May 30, 2026

Gov. Gavin Newsom and the legislature, with a significant budget surplus, began earmarking even more funds, leading to a peak of $1.1 billion in wildfire mitigation investments during the 2021-2022 fiscal year.

From Los Angeles Times • May 30, 2026

In 2025 alone, the utilities planned to spend more than $9.2 billion on preventing their equipment from sparking the next devastating wildfire, primarily funded by Californians’ electricity bills.

From Los Angeles Times • May 30, 2026

Away from the wildfire, the air will cool.

From "Paradise on Fire" by Jewell Parker Rhodes

Related Words

• blaze
• conflagration
• flare
• flash
• light
• spark